Error during the upgrade to terraform-0.12

Terraform
1

I’m trying to move to terraform-0.12 but getting an error while running commands which work with the state:
e.g.

terraform plan
terraform state list

Error:

Error refreshing state: 2 problems:

- Attribute name required: Dot must be followed by attribute name.
- Attribute name required: Dot must be followed by attribute name.

Versions:
Terraform version: 0.12.4
provider aws version 2.19

Even with TRACE logging level, it’s hard to understand the root problem.

Validation:

terraform validate
Success! The configuration is valid.
2

Does this help to find out what the issue could be?

Would it be possible to share the .tf files with the sensitive information removed ?!?

3

But looks like it’s the problem with state, not with .tf files.
I think tf-0.12 can’t work with the state.
And the mentioned article doesn’t help.

4

The problem was in resource name.
I’ve renamed all resources with name which starts with digit. But section depends_on had old name.

"depends_on": [
     "aws_iam_user.42_dns"
]

will share this information here https://github.com/hashicorp/terraform/issues/21435